Historical clue formulations

• Numeral on some sundials — 2023-09-14
• Rare grandfather clock numeral — 2017-11-21
• Peculiar sundial numeral — 2015-05-06
• It's 180° from X — 2012-06-08
• Peer group? — 2009-07-30
• 4, on a sundial — 2006-11-13
• Sundial hour — 2006-06-04
• Late afternoon on a sundial — 2005-02-15
• Four on a sundial — 1994-11-28